#!/bin/bash

blargityblargblarg &> /dev/null
while [ ${?} != 0 ]; do
  sudo echo 'test' > /dev/null
done

COUNT=$(sudo grep -c "${1}" /etc/crypttab)

[[ ${COUNT} -eq 0 ]] && echo "Identifier '${1}' not found." && exit 1
[[ ${COUNT} -gt 1 ]] && echo "Identifier '${1}' is not unique." && exit 1

CTLINE=$(sudo grep "${1}" /etc/crypttab)

echo "Identifier '${1}' found in the following line:"
echo "${CTLINE}"

MPNAME=$(sudo grep "${1}" /etc/crypttab | sed 's/#//g;s/  */ /g;s/ /\t/g' | awk '{ print $1 }')
DEVICE=$(sudo grep "${1}" /etc/crypttab | sed 's/#//g;s/  */ /g;s/ /\t/g;s/UUID=/\/dev\/disk\/by-uuid\//g' | awk '{ print $2 }')
KEYFIL=$(sudo grep "${1}" /etc/crypttab | sed 's/#//g;s/  */ /g;s/ /\t/g' | awk '{ print $3 }')

set -x
sudo cryptsetup open "${DEVICE}" "${MPNAME}" --key-file "${KEYFIL}"